From the UN's Guardians of World Peace's (GWP) air force, navy, and rangers, Commander Arashiyama assembles three specialists to become Sun Vulcan.

Führer Hell Saturn prays to the Black Solar God and is rewarded with a revived Queen Hedrian, now a cyborg with a mechanical heart and a metallic afro.

The original Vul Eagle, Ryusuke Ohwashi, is replaced by a friend and master of the sword, Takayuki Hiba (who first appeared in episode 23).

Intending to have its Mechahumans rule the world, Black Magma's technology is advanced enough to cause natural disasters and cause global incidents.

However, Black Magma targets Japan in order to obtain the cache of geothermal energy there needed to power their arsenal.

A Sun Vulcan movie written by Shozo Uehara and directed by Shohei Tojo was released on July 18, 1981, at the Toei Manga Festival (on the same day episode 24 aired).